Improvement in augers



c. r; KING.

Angers.

Patented Dec. 22, I874,

Knonum WITNESSES:

UNITED STATES FATEN'I OFFICE.

cnARLns F. KING, or oovrNeroN, PENNSYLVANIA.

IMPROVEMENT IN AUGERS.

Specification forming part of Letters Patent No. 158,090, dated December22, 1874; application filed May 23, 1874.

To all whom it may concern;

Be it known that 1, CHARLES F. KING, of Covington, Tioga county,Pennsylvania, have invented a new Improvement in Angers, of which thefollowing is a specification:

In the accompanying drawing, Figure 1 represents a side view of myimproved anger with detachable cutter, and Fig. 2 a bottom view of thesame; Fig. 3, a top view of the cutterhead detached, and Figs. 4 and 5side and bottom views of anger with detachable cutter taken off.

Similar letters of reference indicate correspondin g parts.

The object of my invention is to provide an improved auger withdetachable cutter-head, for being readily replaced when injured withoutrequiring a new auger, and allowing the use of the auger with cutters ofvarious sizes.

My invention consists of an auger with detachable cutter-head placedover the screwpoint, and connected by grooves with dove- Tailed siderecesses, fastening the screws to the lips of the auger.

A in the drawing represents an auger made in one piece with thescrew-points A thereof.

The detachable cutter B is provided with a central perforation to heslipped over the screw, and with twisted and tapering blades fittingexactly the shape of the lips of the auger-shank. The upper part of thecutter B has a central groove, (1, with dovetailed recesses a atdiametrically-opposite sides, for engaging the edges of the auger-lips.Each blade of the cutter B has one or more perforations, b, whichcorrespond with connecting: holes of the auger, for riveting or screwingthe cutter-head firmly thereon.

The cutter may be readily applied and detached, saving thereby theexpense for a new auger when any part of the cutter-blades gets injured,and allow, also, the attachment of larger sizes for boring larger holes,if required.

Having thus described my invention, I claim as new, and desire to secureby Letters Patent- An auger having a detachable cutter-head connectedthereto by dovetail recesses and screws, as shown and described.

CHARLES F. KING. Witnesses:

DAVID A. GRAVES,

G. H. 00E.

